Page 101 - PortGPT_V2.1_C8_Flipbook
P. 101
</SCRIPT>
</BODY>
</HTML>
Output of the Program 1 is:
THE WHILE STATEMENT
The while statement or loop is used to repeat a set of instructions until a conditional expression
returns True. Once the expression returns False, the loop is terminated. Following is the syntax of
the while loop in JavaScript:
initialisation_expression;
while (conditional_expression) {
//loop body
update_expression;
}
Where,
• initialisation_expression: In this expression, a variable is initialized. Unlike for loop, this section
appears outside the loop.
• conditional_expression: Similar to for loop, this expression contains a logical condition which
evaluates either True or False.
• update_expression: The loop control variable is updated here.
For example,
i = 0;
while(i<5)
{
document.write(i);
i++;
}
Loops in JavaScript 99

